Demountable rim.



J. BAKER.

DEMOUNTABLE RIM.

APPLICATION FILED JULY 21, 1910.

- Patented Aug..29, 1911.

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JOHN BAKER, or PASADENA, CALIFORNIA.

DEMOUNTABLE RIM.

Specification of Letters Patent.

Patented Aug. so, 1911.

Application filed July 21, 1910; Serial No. 573,108.

10 struction' for securing the demountable rim in place which will securely hold the demountable rim against lateral movement and also prevent it from circumferential for a quick release of the demountable rim to enable its removal and to rovide a quick locking thereof after it has een placed on the felly.

A further object of'theinvention is to provide a support adjacent to each edge of the demountable rim when it is in position and toso construct said edge supports that the-demountable rim may be forced into close engagement therewith to secure a good fit, preventrattle, and form a perfect seat.

Referring to the drawings: Figure l is a sectional View on an enlarged scale taken on line w -a2 Fig. 7. Fig. 2 is a view similar to Fig. 1, showing the demountable rim released and partially removed. Fig. 3 is a section on line w -m Fig. 1. Fig. at is a section through the valve stem portion of the rim on line c -m Fig. 7. Fig. 5 is a perspective'view of the ,revoluble locking device. Fig. 6 is a view similar to'Fig. 3, showing the revoluble locking device turned into position to release the demountable rim, the arrows "showin the direction in i which the demountable rim is moved away released thereby. Fig. 7 is a side elevation of a wheel equipped with the invention. Fig. 8 is a plan view of that portion of the rim through which the valve stem extends.

secured the fixed rim 2, which on its inner edge is provided with an up-curved flange 3, the upper, edge of the flange being inwardly beveled, as shown. The outer edge of the fixed rim 2 has an up-turned flange 4, the outer edge of which is beveled upwardly and inwardly, as shown.

5 designates the demountable rim which is formed on its inner edge with a recessed 5 flange 6 to receive the bead 7 of the tire.

A removable flange 8 is detachably secured to the outer full details movement, and a further object is to provide from the locking device after having been 1 designates the folly on which is rigidlyon the end of the screw -nut to prevent the nut 19 from loosenlng portion of the demountable rim 5 in any desired manner as by the expansible ring .9, the outer removable flange 8 receiving the outer bead 10 of the tire. The

of the'construction of the removable retaining fiange 8 and locking ring. 9 are given in a former patent of mine No. 913,254, dated February 23, 1909, but it should be understood that the present inventlon is not restricted to any particular construction of the retaining flange 8, and it- 1's not restricted to the removability or nonre'movability of the'flange 8. It is sufficient for the purposes of thepresent invention that the demountable rim 5 be provided with w some means for securing the tire thereto.

The-demountable rim 5 on its outer edge is provided with a beveled abutment 11, which is adapted to seat against the beveled flange, 4, while the curved portion of the flange 6 is adapted to seat against the beveled edge of the flange 3.

The deinountablerim 5 is provided on its I inner surface with a series of locking lugs 12, the contour of each of which is clearly outlined in Figs. 3 and 6. Each locking lug 12 comprises a circular portion, as shown, and has a lateral projecting segmental por tion 13, thereby forming two abutments 14 and 15 which serve as stops to limit the turning movement of a rotatable locking de vice shown in detail in Fig. 5 and comprising a disk 16, on the upper face of which is a segmental lug 17, which lug is adapted to be revolved partly around --.the segmental f portion 18, so that it will occupy either' the position shown in shown in Fig. 6, the abutment 15 serving as a stop to limit its movement intoithe position shown inFig. 3 and the abutment l Fig. 3 or the positioni serving as a stop to limit its movement into the position shown in Fig. 6. The disk 16' is carried on the end of a screw 18 which projects rotatably through the fixed rim 2 and is screwed in a nut 19' which lies in a recess in the felly 1. The lower end of the screw 18 has a squared end 20' to receive a wrench or key for turning it. That portion of the nut 19 which projects from the felly 1 is formed with a hexagonal portion 21 to receive a wrench, while the cap 22 is screwed 18 to act as a lock and to also cover and finish the end of the screw 18. There may be as many of these locking devices as desired, for example,-one

the valve stem passes, and 011 its inner face the demountable rim is formed with an an nular boss 25 whieh encircles the bore 2 1. The fixed rim 2 at this point is provided with a bore 26 which registers with the bore 24 to. receive the valve stem and formed annularly around the bore 26 is a recess 27 with beveled walls 'to receive the boss 25, the latter also having beveled walls, as shown. I The demoun'table rim is secured in position by the lugs 17 which bear against the outer faces of the locking lugs 12 and the segmental portions 13, as shown in Figs. 1 and 3, the flange 6 and beveled portion 11 of the demountable rim being respectively securely seated against the beveled edges of the flanges 3 and l, the nuts 19 being securely tightened against the inner face of the fixed rim 2 to prevent the disk 16 from turning and the nuts 19 being locked against loosening by means of the caps 22.

When it is desired to remove the demountable rim, the caps 22 are first removed, then the nuts 19 are loosened and then each screw 18 is turned one-half around, which will move-its locking lug'17 from the position shown in Figs. 1 and 3 to the position shown in Figs. 2 and 6. There is no difficulty in determining the exact amount of rotation to be imparted to the screws 18, because the abutments 14 will act to positively stop the lugs 17 when they arrive at the correctunlocking position; thus, it is only necessary to turn the screws 20 as far as they will go. This will'place all of the lugs 17 in the position shown in Fig. 6, whereupon the-demountable rim may be removed from the fixed rim' in the direction indicated by the arrows in Fig. 6, and as illustrated in Fig. '2. It'should be noted that in removing the demountable rim, that portion adjacent the valve stem is not slid from the fixed rim first but the opposite portion of the demountable rim is first swung outward, during which time the boss remains seated in the seat 27in the fixed run, but as soon as the demountable rim has been swung out sufficiently to clear the fixed rim, then the demonntable rim is moved radially with respect to the fixed rim in a direction to withdraw the boss 25 from its seat 27. In replacing the demountable rim,

that portion of it having the boss 25 is first inserted, thehoss 25 entering the recess 27, and then the demountable rim swung inwardly and slipped into place. After which, all of the screws 18 are turned onehalf around which will bring the lugs 17 into position shown in Fig. In turning the screws 18 into locking position, they should be turned as far as possible which will result in the lugs 17 acting against the inclined abutments 15 to'force the locking lugs 12 inward, so that the demountable rim will be crowded inward and firmly seated on the beveled edges of the flanges 3 and 1. 1 After the screws 18v have been thus turned, the nuts 19 are tightened and the caps 22 applied. The lugs 17, being curved and fitting the circular segmental portlons 13, prevent the demountablc rim from circumferential movement. This is further prevented by the boss 25 which is seated in the recess 27.

What I claim is:

1. A fixed rim, a dem'ountable rim thereon, a plurality of eccentric lockinglugs rotatably mounted on the fixed rim, and a series of fixed lugs on the demountable rim located concentric with the axes of themtatable lugs, whereby said rotatable lugs may be -moved into positions on either side of the fixed lugs on the demountable rim to either lock or unlock the demountable rim.

2. A fixed rim provided with beveled seats at each edge thereof, a demountable rim formed with beveled faces slanting substantially in the same direction adapted to respectively fit the said seats, the demountable rim being provided on its inner surface with 1 a series of locking lugs, and a series of to tatable lugs mounted on the fixed rim and operable into an eccentric posit-ion atone side or the other of the locking legs on the demountable rim.

3. A'fixed rim, a demountable rim therefor, a series of locking lugs on the inner surface of the demountable' rim circular in form with segmental lateral projections forming steps, a series of locking lugs rotatably mounted on the fixed rim, each rotatable lug being operable into a position at either side of its associated lug on the demountable rim, the said rotatable lug being limited in its movement in either direction by the said segmental projection on the associated lug.

at. A fixed rim, a d'emountable rim therefor, a series of locking lugs on the inner face of the demountable rim, each of said lugs being circular, a series of lugs rotatably mounted on the fixed rimeccentric to the respective lugs on the demountable rim, each rotatable lug on the fixed rim having a concave surface which receives a lug on the demountable rim and. thereby prevents cireumferential movement of the demountable r m, at the same time preventing lateral displacement of the demountable rim. 7

5. Av fixed rim, a demountable rim therefor, a series of screws rotatable in the fixed rim, a series of nuts on said screws tightened against the fixed rim to prevent rotation of the screws, a series of disks carried y said screws, each disk being'forined with a segmental locking lug, a series of In s on t e demountablerim each provided with a segmental lateral projection 'coacting with the associated rotatable lug to detachably. secure the demountable rim in position.

,6. A felly, a fixed rim thereon, a demount'able rim reinovable from the fixed 0 rim, a series. of screws rotatable in the fixed rim and passing through the felly, the felly having nut receiving recesses around each screw, nuts in said recesses on the respec tive screws, a'disk on each screw, a locking lug carried by each disk, and lugs 0n the deniountable riin adapted to coact with the lugs on the diskfor detachabiy retaining the demountable rim.

In testimony whereof, I have hereunto set my hand at Los Angeles, california this 15th day of July, 1910.

JOHN BAKER.

In presence of- G. T. HACKLEY, FRANK L. A. GRAHAM. of this patent may obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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